Biology - Mock Test 291

Question 2901

Which one of the following blood vessels in mammals would normally carry the largest amount of urea?

A) Dorsal aorta B) Hepatic portal vein C) Renal artery D) Hepatic artery

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Question 2902

Which one of the following is responsible for guttation?

A) Root pressure B) Transpiration C) Photosynthesis D) Osmosis

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Question 2903

Watson and Crick composed the model of DNA structure in?

A) 1953 B) 1943 C) 1955 D) 1963

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Question 2904

The DNA is the genetic material was proved conclusively be?

A) JD Watson B) Hershey and Chase C) Alfred Griffith D) Boveri and Sutton

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Question 2905

Rh factor derives its name from?

A) monkey B) ape C) rhino D) human care

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Question 2906

Heterosis is?

A) hybrid incompatibility B) hybrid vigour C) structural hybridity D) hybrid sterility

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Question 2907

“Barr body” is derived from?

A) autosomes in males B) autosomes in females C) X-chromosome in female D) X-chromosome in males

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Question 2908

Genes located on Y-chromosome are?

A) mutant genes B) sex-linked genes C) autosomal genes D) holoandric genes

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Question 2909

Inheritance of total colour-blindness is?

A) X-linked B) XY-linked C) Y-linked D) none of these

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Question 2910

Inheritance of total colour?

A) X-linked B) XY-linked C) Y-linked D) none of these

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